Sharpener
AssigneeKUM Limited
InventorFritz Lüttgens
Life of this patent
Estimating the term…
Abstract
A sharpener (1) contains a housing (5) with a blade (13) which is screwed on said housing and forms a tangent to a hollow-conical region (6b) of a guide channel (6) for the pencil (2), said hollow-conical region adjoining a hollow-cylindrical region (6a), a bending edge (19) being formed in the process. In the fixed position, the blade (13) is subjected to bending stressing in that, with the outer end (14) of the blade (13) being guided beneath the housing-side protrusion (16), the inner end (18) of said blade is fixed on the housing (5), the blade (13) being bent about the bending edge (19) in the process. This thus provides particularly secure and space-saving blade fixing (12) at both ends.
Claims9
A pencil sharpener, comprising:
- a housing, said housing having a housing-side protrusion and a guide channel, said guide channel having a hollow-cylindrical region formed therein and a hollow-conical region formed therein adjoining said hollow-cylindrical region;
- a bending edge formed at the intersection of said hollow-cylindrical region and said hollow-conical region, said bending edge supporting fixation of said blade beneath said housing-side protrusion;
- a fixing device;
- and
- a blade having an outer end and an inner end, said inner end disposed opposite said outer end, said blade retained on said housing by fixing said outer end beneath said housing-side protrusion and by fixing said inner end on said housing using said fixing device.
Dependencies are inferred from the claim text.